Can Allergies cause Low-Grade Fever? Yes Allergies Can

Can Allergies cause Low-Grade Fever? Yes Allergies Can

This is the question that stimulates the brain of many people, especially those who regularly check fever. Are the cough and sneeze occur from a cold or due to allergy? This question confuses many people.

Allergy symptoms usually include sneezing, watery eyes, a runny nose, or even a skin rash. A few allergens can considerably trigger allergic reactions known as anaphylaxis in medical terms.

In some cases, allergy symptoms can make you vulnerable to a bacterial or viral disease. And a bacterial or viral illness can allergies cause low-grade fever, so you can indirectly blame fever on your allergy.

What is Low–Grade Fever?

Can Allergies cause Low-Grade Fever

A low–grade fever refers to an increase slightly in body temperature than an average body temperature. There is no standard degree for these particular temperature radius corresponding to low-grade fever.

Despite the particular reach that may describe a low-grade fever, the binding factor for all low-grade fevers represents temperatures over the ideal temperature.

 The reason for low–grade fever symptoms may be different. It occurs due to cold and flu or also due to allergies. However, the fever occurs due to cold, and allergies are more likely to be low-grade fevers. 

Common Symptoms of Allergy

The symptoms depend on the allergy, known as an allergen; whether you have an allergy with dust, peanuts, or anything, if you come in contact with any of these, it instantly produces chemicals in the body, which causes an allergic reaction.

It depends on the particular individual and allergen; the symptoms include:

  • Watery nose
  • Itchy eyes
  • Sneezing
  • Coughing
  • Headache
  • Sore throat

Can Allergies Raise your Body Temperature Slightly?

Can Allergies cause Low-Grade Fever

 When a body overreacts to content, it causes an allergic reaction which is unsafe. Subsequently, the immune system produces antibodies and histamine to fight off the apparent invaders, causing an inflammatory response that causes you to feel out and lousy.

Even though seasonal allergies are once in a while called “hay fever,” they don’t generally trigger a hike in temperature; fevers are likely to be viral or bacterial.

It’s essential to note that your immune system works at least 40 hours to fight against allergies, expanding their powerlessness to colds, sinus infections, or viruses. Your body can have a fever due to an allergic reaction but be cautious sometimes; the high body temperature and high fever won’t be the reason for allergy.

Diagnose of Allergy

Suppose you found that your fever occurs due to an allergy. In that case, you should consult with the allergist doctor who gives you proper treatment, diagnose your allergy symptoms, or reduces or prevents it from further increase. 

Diagnosing the allergy requires a physical test. This procedure will need your medical history, which helps identify the connection between your symptoms and the exposure to the allergen that may trigger the symptoms. 

Keep note of when this allergy occurs and why your doctor helps your doctor find the cause—for Example, noting when your symptoms appeared and in what seasonal changes occur in your body. If this happens, then provide this information to your doctor which can easily find the clues.

Your doctor may suggest you a skin prick test which helps in diagnose the allergy. In these tests, a small amount of an allergen is injected into the body. This test reveals that whether you are allergic or not due to this particular allergen. However, the blood test can be ideal for it.

Cause of Allergy Symptoms and Fever

Viral fever can cause to develop allergy symptoms along with fever, one thing which is notable that a person has allergy symptoms as long as the effect of exposure to the allergen.

However, the allergies cause a person to have symptoms of watery and itchy eyes. These do not happen in cold or flu. 

Common Cold

The common cold occurs due to infection with a virus. A person experienced a high temperature of the body as well as chills in the cold.

The symptoms are:

  • Body pain
  • Cough
  • Blocked Nose
  • Sneezing
  • Headaches


The flu can have similar symptoms to allergies because it both affects the human respiratory system. The flu can cause a fever that remains for 3 to 4 days.

Other symptoms of flu are

  • Runny nose
  • Chest congestion
  • Sore Throat
  • Fatigue
  • Itchy


Sinusitis is the swelling of an individual’s sinuses. It causes hollow cavities in the face, cheeks, nose, and eye area. Nonetheless, if the sinuses become swollen, the mucus will not deplete appropriately and develop. 

Sinusitis ordinarily happens after a disease, like the regular cold or influenza. A person may cause a fever in acute sinusitis.

Other sinusitis symptoms can include: 

  • Pain in forehead and cheeks 
  • Postnasal drip
  • Solid yellow or green release from the nose 
  • Blockage 
  • Congestion
  • Toothache


For bacterial infection, the treatment is to take antibiotics to remove fever and other symptoms. The viral fever remains few days after that; it resolves its own.

If an individual feels fever, they may treat it with home remedies like:

  • Taking rest
  • Drinking liquid contents
  • Take relief medicine like acetaminophen or ibuprofen
  • Use of decongestants or nasal sprays to help congestion
  • Avoiding alcohol and caffeine which lead to dehydration

If a person may suffer due to allergy, they can come up with medications consulting with the doctor, which helps him cure it.

The treatment depends on allergy, but it includes:

  • Antihistamines
  • Corticosteroids to reduce redness in the nose
  • Immunotherapy, such as allergy shots or tablets
  • Avoid food or particular medicine which cause allergens
  • Wear a face mask or sunglasses around other allergens
  • Regularly clean floor and other areas to reduce the amount of dust and mold

Can Allergies Cause Fever In Kids

While few seasonal allergies, like a runny nose and coughing, imitate a cold, fever doesn’t happen in allergies. If your kid has a fever, they probably have either a viral or bacterial disease. 

For instance, infections like the basic cold or flu cause fever as the immune system battles to fight them off. Bacterial infections like sore throat may likewise lead to fever—thus can ear diseases, heat fatigue, urinary plot diseases, and more.

Consult with your pediatrician about any troubling within your child. They may have to treat the primary reason for their fever with antibiotics.

Tips for dealing with a fever 

Dealing with a fever begins with taking an exact temperature and knowing when a low-grade fever has progressed to one that requires medical attention.

A thermometer held under the tongue can get the accurate measure in around 40 seconds. An advanced rectal thermometer for infants takes about the same amount of time. 

The average body temperature level, 98.6° F (37° C), is an average body temperature. The normal body temperatures range from 97° F (36.1° C) to 99° F (37.2° C) and now and then more. 

So, body temperature can change about a degree higher or lower than 98.6° F without any health concerns.

If your temperature at 100.4° F (38° C) or higher, you have a fever, and almost certainly, you have an infection. You should consult with a doctor and begin treatment.

Are you sure these are Allergy Symptoms?

If you don’t feel like a fever, you should take good care of yourself. Sometimes, untreated allergies can cause significant sinus infections and even asthma; if you try home remedies, it can change in a worse situation.

Suppose you feel bad breath, yellow or green mucus, or feel cold. It may be a cause of sniffles, but you should consult with your doctor about the proper treatment for safety. 

The answer to can allergies causes a low–grade fever is yes. But the fever is not that severe, you may think. If you face issues with allergies, you should consult with a doctor; they may give you the proper and best possible treatment. The longer you untreated it, it may go worse day by day. So take action now!!

When to See a Doctor?

When you are facing significant issues with allergy symptoms, you should seek guidance from a doctor. If your fever remains more than ten days and symptoms are not improving with OTC medication.

Take guidance from a doctor if the fever is causing:

  • Unnecessary shivering, shaking, or teeth chattering
  • Vomiting
  • Increased heart rate
  • Skin rash
  • Confusion and drowsiness
  • High temperature with sweat
  • Muscles Contraction

People should seek medical emergency if they have extreme allergic symptoms called anaphylactic shock. The symptoms include:

  • Diarrhea
  • Losing Consciousness
  • Low blood pressure
  • Difficulty in breathing
  • Swelling in throat
  • Vomiting


Allergies can cause a low–grade fever. If a person may face continuous fever or allergy, they should immediately consult with a doctor and diagnose plan.